Personally, I think body underwear is called fat management instrument because it makes full use of fat ionization. Rural people use yellow rice to prick the little girl's ear and twist the upper and lower sides in the center of the earlobe to let the fat on the earlobe free to the periphery. If there is no fat in the middle, just wear two layers of skin. After wearing the ring for a long time, the fat went to both sides and there was a ditch in the middle. Therefore, wearing a three-piece suit on the body is like wearing a ring on the waist. The waist fat is compressed and free to the chest and buttocks, and an S-shaped curve is carved. Therefore, we also call it a three-piece machine.